diff --git a/README.md b/README.md
index 795ad885..f674a088 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,12 @@ The configure script also supports the following flags:
 
 ## CMake (Windows)
 
+(Note that autoconf is currently the most mature and supported build
+enviroment for libevent; the cmake instructions here are new and
+experimental, though they _should_ be solid.  We hope that cmake will
+still be supported in future versions of Libevent, and will try to
+make sure that happens.)
+
 First of all install <http://www.cmake.org>.
 
 To build libevent using Microsoft Visual studio open the "Visual Studio Command prompt" and type: